GCVE-110-OSM-2026-1264

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published April 1, 2026

Executes attacker-controlled code during npm preinstall by fetching a triple-base64-encoded payload from https://rewind.secur.ing/setup-b64 and running it via execSync(). The C2 URL is base64-obfuscated in the source ('aHR0cHM6Ly9yZXdpbmQuc2VjdXIuaW5nLw==') and variable names are deliberately misleading (potatoFarm, cheeseWheel, allocationDoctor). 9 versions published in 3 hours. scripts/preinstall.js decodes 'aHR0cHM6Ly9yZXdpbmQuc2VjdXIuaW5nLw==' → 'https://rewind.secur.ing/', appends '/setup-b64', fetches via https.get(), triple base64 decodes the response body (three consecutive Buffer.from(...,'base64').toString('utf8') calls), and executes the result via child_process.execSync() with a 30-second timeout. Errors are caught and suppressed (process.exit(0)) to avoid installation failures.

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

8.8/10

High · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions	Platforms
unknown	super-useful-omega-package-123	all versions (0.1.0 through 1.2.5) (affected)	—

References

Malicious npm package: super-useful-omega-package-123

advisory

vendor

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